Dye-vat.



Patented Jan. 2, I900. H. ILLGEN.

DYE VAT.

(Application filed Dec. 23, 1897.)

(No Model.)

[Vii/z asses [22 zwz Z01 THE NORRIS PETERS my, PHoTO-LITHQ, WASHINGTONn. c.

' UNITED STATES PATENT OFFICE,

I-IERMANN ILLGEN, OF ORIMMITZSOHAU, GERMANY.

DYE-VAT.

SPECIFICATION forming part of Letters Patent No. 640,203, dated January2, 1900.

Application filed December 23, 1897. eri l N01 1 N m m To all whom itmay concern.-

Be it known that I, HERMANN ILLGEN, a subject of the King of Saxony, anda resident of Orimmitzschau, in the Kingdom of Saxony,

Germany, have invented certain new and use-' ful Improvements inDyeing-Vats, of which the following is a fnllfclear, and exactdescription.

The present invention relates to dyeingvats, either for producing thedyeing liquor from chips or for dyeing fabrics, and it relates moreparticularly to that class of apparatus in which the circulation of theliquor is kept up by pressure applied to certain liquor-receptacles, apair of which are employed, and each member of the pair is alternatelybrought into direct communication with the source of actuating pressure.The liquor passes from a reservoir through one of the pressu re-chambersto the vat, through which it is forced by pressure, then along anotherpipe, and back to the receptacle for reuse. Du ring this process and atthe moment when the pressure is changed from one receptacle to the otherin alternating the pressure in the vat will be cut off momentarily, andat this moment a springvalve. arranged in the pipe system leading fromthe vat back to the receptacle closes un: der the influence of itsspring and causes a slight backflow, which is just sufficient to cause ashort backflow of the liquor through the sieve in the bottom of the vat,andthus to clean the said siewe.

In order to render the present specification more easily intelligible,reference is bad to the accompanying drawing, in which similar lettersof reference denote similar parts.

The liquor coming from receptacle G flows along pipe K to a chambercommon to both the receptacles B and B and communicating with eachreceptacle by means of an inwardlyopening valve H and Hi. Pressurederived from any suitable source is fed to the cock through pipe I andalternately applied to one or other of the chambers B B through thefour-way cock 0 and the liquor forced out thereby through one of thevalves B B into II and thence along pipe N to the vat A. It then passesthrough the upper sieve 0 down through the material in the vat and outat the lower sieve F, along the pipe J, past the springpressed valve D,and back along J into the receptacle or reservoir G. Each of thechambers B B is provided with a float M M, at-

tached by means of a chain to the handles of the cock C, and the valvesB and B are springclosed and are opened by the pressure fed to theirrespective chambers.

The device operates in the following manner: The liquor coming from G isnot under pressure, but flows by gravity through the valve H (open) intothe chamber Baths valve B of, which is closed. The position of the plugas shown at this time is such that the upper part of the chamber B is incommunication with the open air through pipe R and the plug of saidcock. The cock is, however, simultaneously supplying pressure comingfrom I along the pipe P to the chamber B, and the liquor in the samekeeps the valve H closed and is simultaneously forced out through thevalve 15% into the chamberHand thence along N to the vat A,from thisalong J through the spring-valve D, and back to the reservoir G. As soonas all the liquor has been forced out of chamber B the float M in thesame in sinking will pull the handle of the cock 0 over, thus reversingthe cock and placing the said chamber in communication with the outerair and supplying pressure to the chamber B which has been refilled inthe meantime. This causes the valve H to close, and the valve 13 willnow be opened by the interior pressure in B so that liquor will now passto the vat from B Now just at the moment of changing the chambers B Bthe vat A will be relieved of pressure altogether for an instant, and atthis moment the valve D closes under the influence of its spring,creating a short back current in the liquor which is driven back throughthe sieves F and O, and this slight back current serves to clean thesieves. This is the object of the invention.

I claim as my invention- In an apparatus for dyeing or producing dyeingliquor, having a vat with sieves, a pair of pressure-chambers and meansfor feeding liquor from the said chambers, under pressure, alternately,to the said vat, and a pipe system leading from the liquor-reservoir tothe said pressure-chambers and from the vat IOO back to the saidreservoir, as specified, the In testimony whereof I have signed mycombination of a spring-pressed valve D arname to this specification inthe presence of ranged in the pipe leading from the vat back twosubscribing Witnesses. to the reservoir and adapted to close suddenlyHERMANN ILLGEN.

5 when the vat is momentarily relieved of pres- W'itnesses:

sure in the manner and for the purpose snb- HERM. LAUK, stantially asdescribed. RUDOLPH FRICKE.

